Drilling tool



FIG. 1 is a front view of a drilling tool,

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is an enlarged front view of XLVI-XLVI portion of FIG. 1,

FIG. 9 is an enlarged top view of XLVI-XLVI portion of FIG. 1,

FIG. 10 is an enlarged right side view of XLVI-XLVI portion of FIG. 1,

FIG. 11 is an enlarged first perspective view of XLVI-XLVI portion of FIG. 1; and,

FIG. 12 is an enlarged second perspective view of XLVI-XLVI portion of FIG. 1.

The broken lines shown in the drawings represent portions of the drilling tool that form no part of the claimed design. 

CLAIM The ornamental design for a drilling tool, as shown and described. 